Pitman



Nov. 30 1926. v 1,608,626

w. SCHWEMLEIN PITMAN Filed Oct. 23, 1925 WILLIAM SCHWEMLEIN Patented Nov. 30, 1926.

STATES PATENT ()FFHUZ.

WILLIAM SCI-IWEMLEIN, OF PARKERSBUBG, WEST VIRGINIA, ASSIGNOE TO THE PARKERSB'URG BIG AND REEL COMPANY, OF PAIKYIIERSBURG, "WEST VIRGINIA, A.

CORPORATION OF WEST VIRGINIA.

PITMAN.

Application filed October 23, 1925.

A further object of the invention is the provisionot a locking member adapted to normally maintain the bearing cap in operati've position and being further adapted to retain the bearing cap in raised position when it is open.

A further object of the invention is the provision of a practically indestructible metal pitman, the parts of which are interchangeable and can be readily replaced.

In the accompanying drawings, I have shown one embodiment of the invention. In

this showing:

Figure 1 is a perspective view,

Figure 2 is a front elevation of the lower end of the pitman on an enlarged scale, parts being shown in section,

Figure 3 is a detail sectional view on line 33 of Figure 2,

Figure 4 is a similar view on line 4-4 of Figure-2, and,

Figure 5 is a perspective view of the looking plate.

Referring to the drawings, the reference numeral 1 designates generally the bearing body which is substantially right-angular in shape. As shown, the body is formed of channel iron having a base 2 and side walls 3. The side walls are extended beyond the base at the bottom of the bearing body, as indicated at 4, and connected to each other by a transverse web 5. A pipe 6 is secured to the upper end of the body and the connection is reenforced by a steel collar 7 which is shrunk onto the stem. A stirrup 8 is connected to the upper end in the usual manner.

The bearing body is provided with a substantially semicircular portion adapted to receive a bushing 9. A bearing cap 10 is adapted to cooperate therewith and is provided with a similar semicircular bushing 11. As shown, the bearing cap is hingedly mounted on a pin 12 arranged in the side walls of the bearing body. The cap is adapted to be arranged in the position shown in full lines in Figures 1 and 2 of the Serial No. 64,451.

drawings when assembled to receive a wrist pin 13, and when the bearing is opened, the cap is swung to the dotted line position, as shown in Figure 2 of the drawings. The cap is maintained in operative position by means of a bolt 14, which is provided with an eye 15 at its lower end and is adapted to receive a pin 16 arranged at the front end of the bearing body. The bolt is adapted to be received in a slot 16" formed in the free end of the cap. As shown, nuts 17 are arranged on the bolt beneath the cap and a nut 18 is arranged on the bolt above the cap to permit the cap to be tightened.

To insure retention of the bearing cap in operative position, I provide a locking plate 19 having a hexagonal opening 20 for the reception'ot the nut 18. This plate is pro vided with extensions 21 at its rear end, which are curved as at 22, to receive a hinge pin 23, mounted in a pair of cars 24 formed on the cap. A spring 25 is connected to the locking plate adjacent its rear end and arranged in a recess 26 in the cap. As shown, the end of the spring is secured to the cap by a suitable fastening element, as at 27. The bearing body is provided with a recess 28 in which the locking plate is received when the cap is in open position.

The operation of the device will be apparent from the foregoing description. With the parts in the full line position shown in Figure 2 of the drawings, the spring 25 exerts a downward pull on the locking plate 19 to prevent it from becoming displaced and thus permitting the nut 18 to become loosened. To open the bearing, the plate 19 is first swung upwardly and the nut 18 loosened suficiently to perunit the bolt 14 to be removed from the slot 16.

When the locking plate is swung upwardly, the line of pull exerted by the spring passes to the other side of the pivot point of the locking plate and the spring then exerts a pull in the opposite direction. When the bearing cap is in the open position shown in dotted lines in Figure 2 of the drawings, this pull of the spring in the opposite direction retains the locking plate in the recess 28 with the adjacent portion of the bearing body received in the opening 7 sorted to without departing from the spirit of the invention or the scope of the subjoined claims.

I claim:

1. In a device of the character described, a bearing body, a bearing cap hingedly mounted on said bearing body, a bolt pivotally mounted on said bearing body, a nut mounted on said bolt and adapted to engage said cap to retain it in operative position, a locking plate hinged to said cap and adapted to be arranged over said nut, and a spring connected to said locking plate to normally retain it in operative position.

2. In a device of the character described, a bearing body, a bearing cap hingedly mounted on said body, a bolt pivotally mounted on said bearing body, a nut mount-- ed on said bolt and adapted to engage said cap to retain it in operative position, a spring connected to said cap, a locking plate hinge'dly mounted on said cap, said spring being connected thereto and adapted to exert a pull on said locking plate in one direction when said bearing cap and said plate are in operative position and in the opposite direction when said bearing cap and said plate are in open position. 7

3. In a device of the character described, a bearing body formed of channel iron, and having a recess therein, a cap pivoted between the side walls of said channel iron bearing body, a bolt mounted on said bearing body, a nut carried by said bolt and adapted to engage said cap to retain it in operative position, a locking plate hinged to said cap and adapted to be arranged over said nut, and a spring connected to said plate, said spring being adapted to exert a pull on said plate in such direction as to retain said plate in said recess when said cap is in open position.

In testimony whereof, I aflix my signature.

WILLIAM soHw EIN. 

